Defender for Business - No alert after process lock out ?

Hi Karnalta,

When file get detected as malicious it goes through series of check before the cloud protection service decide if its a malicious or not during that time it block the file for which you got toast notification And when that verdict made and the system decided its not harmful when it compared to Microsoft threat intelligence it doesnt raise an alert. There are some resources available online that you can search to test the Defender AV protection and alerting. 

thanks

Rish